Preliminary dioxin test results for 125 Cedar Street, Nov 2002

NYC 9/11 Public Portal Document

PSC Analytical Services Laboratory Method Blanks

Component RDL Units BLANK Batch Code: 1021NZ01 TEF # of Isomers MR 2,3,7,8-CI4DBF 0.85 pg <0.85 <0.085 90% n 2,3,7,8-CI4DBD 0.89 <0.89 <0.89 98% n 1,2,3,7,8-CI5DBF 0.98 <0.98 <0.049 100% 2,3,4,7,8-CI5DBF 0.94 <0.94 <0.47 92% 1,2,3,7.8-CI5DBD 0.81 <0.81 <0.40 81% n 1,2,3,4,7,8-CI6DBF 0.75 <0.75 <0.075 87% n 1,2,3,6,7,8-CI6DBF 0.75 <0.75 <0.075 89% n 2,3,4,6,7,8-CI6DBF 0.85 <0.85 <0.085 77% n 1,2,3,7.8,9-CI6DBF 0.94 <0.94 <0.094 73% n 1,2,3,4,7,8-CI6DBD 1.3 <1.3 <0.13 84% n 1,2,3.6,7,8-CI6DBD 1.3 <1.3 <0.13 80% n 1,2,3.7,8,9-CI6DBD 1.2 <1.2 <0.12 82% n 1,2,3.4,6.7,8-CI7DBF 2.4 <2.4 <0.024 96% n 1,2,3,4,7,8,9-CI7DBF 2.8 <2.8 <0.028 89% 1,2,3,4,6,7,8-CI7DBD 2.3 H <2.3 <0.023 92% n 1.2.3,4,6,7,8,9-CI8DBF 1.2 1.6 0.0016 76% 1,2,3,4,6,7,8,9-CI8DBD 3.4 II 5.5 0.0055 89%

FET 0.007 FETMAX <2.7

ZT4CDF 0.40 pg <0.40 0 90% LP5CDF 0.98 <0.98 0 96% n SH6CDF 0.75 <0.75 0 82% 2H7CDF 2.7 II <2.7 0 93% OCDF 1.2 11 1.6 1 76% ET4CDD 0.89 « <0.89 0 98% LP5CDD 0.81 II <0.81 0 81% SH6CDD 1.3 <1.3 0 82% n ZH7CDD 2.3 <2.3 0 92% OCDD 3.4 5.5 1 89% Surrogate Recoveries % 2,3,7,8-T4CDF-13C12 67 2,3,7,8-T4CDD-13C12 65 1.2.3,7,8-P5CDF-13C12 45 1,2,3,7,8-P5CDD-13C12 44 1,2.3,6.7,8-H6CDF-13C12 68 1,2.3,6,7,8-H6CDD-13C12 77 1.2,3,4.6,7,8-H7CDF-13C12 51 1,2,3,4,6,7,8-H7CDD-13C12 65 OCDD-13C12 131

Certificate No:2J0573 file # =R02100400 prelim report nh Page 2 of 2 Revision No. 0

NYC-WTC_000156968